The John Guest grey push‑fit acetal straight adaptor (MFL thread) converts metric pipe to an imperial MFL thread for connection to a fitting, fixture, or appliance. Installation is quick and effortless: the push‑fit design delivers an instant, leak‑tight seal without the need for tools, heat, or sealing compounds.

Its unique collet‑locking mechanism grips the pipe securely without deforming it or restricting flow. The fittings are corrosion‑resistant and fully demountable, helping to enhance system performance and minimise downtime during maintenance.

Manufactured from grey push‑fit acetal copolymer, the adaptor is suitable for foodstuffs, potable liquids, and inert gases. In line with the British Beer & Pub Association Code of Practice, it can also be used with N₂/CO₂ and mixed‑gas dispense lines, as well as air, pneumatic, and vacuum applications. All John Guest fittings are manufactured and assembled in the UK.